when used with the Rotating Platform, this large rimloaded bicycle wheel provides dramatic classroom demonstrations of the priciples of gyroscopic motion. The wheel rotates on a ballbearing axle to which are attached two form-fitting handgrips. Protective metal shields prevent accidental contact when the wheel is being held. Metal suspension loops are attached to the end of each handle so that the wheel may be hung from a stationary support. A solid rubber tire concentrates the mass at the wheels rim, producing a strong gyroscopic effect at relatively low rotational velocities.